Altogether, the district would like to spend $447 million by 2025 — money that could come from a statewide bond or a potentially a local bond that voters would be asked to approve, Supt. Patrick Sweeney said this week.

After two years of reviewing the needs of its facilities, not to mention dealing with the aftermath of last year’s earthquake, district officials have gone to the school board for help and guidance.

Over the next three months, board members and district officials will be finalizing the district’s “master plan” to determine what projects should go to the top of a lengthy must-do list and how to pay for them.

For starters, the district has “three significant seismic challenges,” said Don Evans, director of school planning and construction.

Three campuses — Napa Junction Elementary School in American Canyon, and Napa’s Snow Elementary School and Stonebridge Charter School — sit atop the West Napa Fault in some way.

Their proximity to the fault requires that the district move some or all of the buildings at these schools, either to another part of the campus or in the case of Napa Junction to another part of the city altogether.

“This one is a little more disheartening,” Evans said of Napa Junction. The fault runs diagonally through the school.

“I can’t get [the school] away from it,” he added. “We will have to acquire a 10-acre site and then build a new school.”

The district is already talking to city officials in American Canyon about finding a new location for Napa Junction, possibly off Eucalyptus Road.

The plan for Snow and Stonebridge is to move classrooms and administration buildings to the other side of their campuses to create more distance from the fault.

The combined cost of moving Napa Junction, Snow and Stonebridge is nearly $80 million, officials said. Additionally, the district has $22 million-$23 million in seismic retrofit needs at other schools, some of which were constructed in the 1950s using basalite blocks that need shoring up.

“We’re bumping a hundred million dollars just to meet the seismic needs in our school system,” said Evans.

Then, there are the costs and challenges of dealing with overcrowded schools in a district that overall had declining enrollment last year.

“Our Napa district is a graying district,” said Sweeney. “It’s a little different from some of the other communities around us. But we also have growth in our district. The growth, however, takes place primarily in the southeast and southwest of Napa, and in American Canyon.”

Napa has an overcrowding problem at Harvest Middle School, which shares its campus with River School. Having two schools at one location prevents either school from growing, so one of them has to move, officials said.

The district is proposing the relocation of River School. Where exactly is unknown now.

River School’s move could be dependent on another issue facing the district: the declining enrollment at the Salvador and El Centro elementary schools in the northeast part of town.

District officials have already contacted parents whose children attend Salvador and El Centro to inform them that the schools face consolidation into one school.

“In order to most efficiently use our school sites, we have proposed consolidating El Centro Elementary School and Salvador Magnet Elementary School on to one combined campus,” the district wrote to parents in an Aug. 14 letter.

“Any changes would take place no earlier than fall 2018, leaving us three years to plan carefully,” the letter states.

The district plans to hold meetings with parents of both schools on Sept. 16.

Once a decision is made which campus will close, the district may use the vacant elementary site to relocate River School.

“We’re trying to follow our demographics and use the buildings we have,” said Elizabeth Emmett, NVUSD’s director of communications and community engagement.

The district has another option for River School: build it a new campus off Trower Avenue, near Vintage High School. But that plan, estimated to cost $42.5 million, is not preferred by Sweeney and Evans.

Shifting River School to either the Salvador or El Centro campus would cost about $22 million, owing to the need to expand facilities for the charter middle school.

The move would also free up Harvest Middle School to grow, and take on students living nearby who can’t go there now.

“There are kids living on the eastside of 29 who get on buses to Silverado [Middle School], but could easily walk to Harvest if there was room for them,” said Evans.

Adding these students to Harvest would give Silverado more room to handle students coming from Phillips Elementary School, which is giving up its sixth grade and going to kindergarten to fifth grade, as well as take on projected students from new housing planned for southwest Napa and at Napa Pipe.

American Canyon, meanwhile, has other needs in addition to moving Napa Junction.

The city’s other two elementary schools, Canyon Oaks and Donaldson Way, are brimming with kids, demanding that a fourth elementary school be added in the coming years.

American Canyon also needs another middle school because the current one is overcrowded, officials said.

And if that wasn’t enough to address, the district has too many aging portable classrooms, some of which date to 1963 and require constant maintenance to keep up. The plan is to move many of the students who have classes in them now into permanent classrooms down the road.

The district has also heard from parents who want better food served in school lunches, which has spawned a plan to put kitchens back into elementary schools, money permitting.

Evans says the $447 million cost of all these changes is a “fluid number,” one that district officials want to reduce with the help of the school board.

“It’s not going to go up,” said Evans, “but it is going to come down.”

The board is expected to debate and presumably whittle away at the many components of the master plan over numerous meetings in the coming months, and then vote on a final plan in November.